chore: use jdk 17 in ci env (#6)

.github/workflows/build.yml

@@ -10,12 +10,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 8
-        uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
-          distribution: 'adopt'
+          java-version: "17"
+          distribution: "corretto"
+          cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: Build with Gradle

.github/workflows/publish.yml

@@ -8,12 +8,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up Java
-        uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
-          distribution: 'adopt'
+          java-version: "17"
+          distribution: "corretto"
+          cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: Grant execute permission for gradlew

.github/workflows/test.yml

@@ -10,12 +10,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
-      - name: Set up JDK 8
-        uses: actions/setup-java@v3
+      - uses: actions/checkout@v4
+      - name: Set up JDK
+        uses: actions/setup-java@v4
         with:
-          java-version: '8'
-          distribution: 'adopt'
+          java-version: "17"
+          distribution: "corretto"
+          cache: "gradle"
       - name: Validate Gradle wrapper
         uses: gradle/wrapper-validation-action@v1
       - name: Run the Gradle package task

README.md

@@ -9,7 +9,7 @@
 
 ### Java Version Requirement
 
-Java 8+ is required to use sdk. not support Java 8 below
+Java 17+ is required to use sdk. not support Java 17 below
 
 ## Getting Started